Chapter 8

Question 1

The ___ drives the ___ of video surveillance systems, not the other way around

Answer 1

Application, Implementation

Question 2

All video surveillance systems will become obsolete at some point in time. This does not mean that they will be ineffective for the original application. if a system has become obsolete, but still functioning effectively, it means that the original application was ___.

Answer 2

properly designed

Question 3

There are three main reasons to use video surveillance systems in security application. What are they?

Answer 3

1. to witness an event or activity, 2. record what has happened for evidence, 3. assessment of incidents and activity.

Question 4

In high security applications, the video cameras may be interfaced with ___ and ___ to provide immediate assessment capabilities when an alarm is triggered.

Answer 4

Intrusion detection devices and access control

Question 5

Video surveillance cameras must consider three factors to determine the field of view requirements.

Answer 5

1. Target, 2. Activity, 3. Purpose

Question 6

Video surveillance systems often use three levels of assessment. What are they?

Answer 6

Subject Identification
Action Identification or Classification
Scene Identification or Detention

Question 7

Video surveillance systems only had three main components. What are they?

Answer 7

1. camera, 2. monitor, 3. cable

Question 8

All ___ employ a 2-to-1 interlace pattern. The monitor first paints the horizontal pattern (odd number sweep lines) and then paints the vertical pattern (even number sweep lines) and then paints the vertical pattern (even number or sweep lines). Although no longer in use today, due to digital video resolution, these analog standards were defined by the NTSC or PAL standards.

Answer 8

analog surveillance cameras

Question 9

A digital video surveillance systems does not use a 2:1 interlace pattern, but rather uses a full grid of small, colored squares known as pixels and measures in frames per second (fps) or images per second (its) using the ___ resolution.

Answer 9

Common Intermediate Format (CIF)

Question 10

What does CIF stand for?

Answer 10

Common Intermediate Format

Question 11

The resolution of a camera is determined by 4 things. What are they?

Answer 11

1. Camera, 2. Transmission method, 3. the weakest link on the video system interface, 4. the reproductive capability of the image storage system.

Question 12

When choosing a camera, you should consider these three things.

Answer 12

1. sensitivity, 2. resolution, 3. camera features

Question 13

___ is the minimum amount of light needed to produce a quality image. lighting is the first consideration when choosing a camera.

Answer 13

Sensitivity

Question 14

The ___ determines the horizontal and vertical angles of the lens (height and width), which is based upon the scene distance from the actual camera lens. The ___ is the most important factor when choosing a lens.

Answer 14

Focal length

Question 15

The ___ refers to the speed of the lens. The larger ___ corresponds to a lesser amount of light being captures by the lens. For low-light, a lower ___ is desired.

Answer 15

F-stop number

Question 16

What does ACG stand for?

Answer 16

Automatic Gain Control

Question 17

___ is a circuit that is build into the camera to provide additional sensitivity and keep a level video signal as light decreases or in areas with shadows. All exterior cameras have ___ feature turned on. ___ degrades the picture quality by a factor of 10 in low-light conditions.

Answer 17

Automatic Gain Control (ACG)

Question 18

___ is the most effective and fastest growing compression technology for transmission and storage. Users must have additional processing power to compress and decompress images.

Answer 18

H.264

Question 19

For purpose of using video surveillance imagery in a court room the admission of evidence, there are three aspects to consider. What are they?

Answer 19

1. Quality of recordings, 2. How it was obtained, 3. Proof of originality (time/date stamp, digital watermarks, ect.)

Question 20

___ cameras should not be used in security applications.

Answer 20

Dummy (fake)

Question 21

Maintenance is best performed by a ___, with an electronic system troubleshooting background., who also understands the components and complexity of the system used in the original system design.

Answer 21

competent on-site staff member

Question 22

The ___ of the lens is a major factor during installation of the camera

Answer 22

optical focusing

Question 23

Depending on the budget allocations and needs, approximately ___ of spare parts should be kept on hand.

Answer 23

5 percent

Question 24

The system should allow for classification of a target ___ at the far edge of the assessment zone.

Answer 24

1 foot large